Directed Lakes 2016 Graham

Purpose

To gather background water quality, aquatic plant and aquatic invasive species data and shoreline data for Ludden Lake (930700), Tarrant Lake (1269100), Hill Slough (12412000), Decatur Lake (879400), Mud Lake (778500) and Beckman Lake (894700). (listed by priority)

Objective

Develop or update general water quality, aquatic plant community and AIS community for these lakes. Ludden Lake and Mud Lake shorelines will also be assessed for current conditions. Ludden Lake is our priority lake because the DL project dovetails with the SW Grassland Birds Project in the upland. Mud Lake conditions assessments are of value due to proposed water level changes for Lake Koshkonong. Information for Tarrant Lake will supplement knowledge related active APM harvesting. Hill Slough is of interest due to concerns about impacts from Big Hollow Drainage Ditch. Hill's Slough (WBIC: 1241200) which is ERW water containing state endangered fish species, and is adjacent to the Lower Wisconsin River. For the same reason, a PI will be done for each basin. Water chemistry will be collected in both it's east and west basins to allow for comparison of possible impacts from ditch overflows. Decatur Lake area residents have concerns about being 303d listed and nearby proposed CAFO. Beckman Lake has little data. It was drawn down many years ago and data collected will be useful for looking at management results.

Outcome

3 sets of TSI data for Mud, Tarrant, Decatur, and Beckman Lakes. Six sets of TSI data for Hill Slough. Ludden was brought up to date for TSI in 2015 and doesn't need water chemistry data; P/I survey for each lake and AIS Directed Lakes protocol survey for each lake. Shoreline assessment for Ludden Lake, Tarrant Lake, and Mud Lake.

Study Design

Per lake: 3 water chemistry sampling events from July 15 – Sept. 15 (typical WisCALM) except for Ludden; 1 plant point intercept survey; 1 AIS survey – this entails a 10 minute search with a Dnet at the boat landing and at 5 targeted sites and 1 Ekman dredge at the deep hole

Related Reports

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Targeted Monitoring
DL2016_Graham
2016
Active
 
Reports and Documents
Decature Lake--Shallows mid-lake 9/11/2016
Wetlands_new island in NW area_20160911
Pelicans on Decatur Lake, Green County
Ludden Plant Sampling Map
Mud Lake (north of Koskonong), Jefferson County Plant Survey Map
Tarrant Plant Sampling Map
Photo of Decatur Lake dam provided by Meredith Tripp
Fall on Decatur Lake, Green County
Headgates for Decatur Lake Mill Race and Headsgate Park Boat Launch
Hill Slough Plant Sampling Map
Decatur Lake Plant Survey Map 2
Decatur Lake Plant Survey Map
Wetlands_new island in NW area_20160911
Corrections were made to sample depths associated with some 2016 Decatur Lake samples (volunteer confused depth of sample with depth of sample point).
 
Activities & Recommendations
Monitor Invasive Species
AIS survey – this entails a 10 minute search with a Dnet at the boat landing and at 5 targeted sites and 1 Ekman dredge at the deep hole
Aquatic Plant Monitoring or Survey
point intercept survey
Monitor Water Quality or Sediment
3 water chemistry sampling events from July 15 – Sept. 15 (typical WisCALM)